-LRB- CNN -RRB- -- The death toll from a shooting at a house party in the violence-plagued Mexican border city of Juarez has climbed to 14 , state media reported Sunday .

Chihuahua State Attorney General Carlos Manuel Salas told reporters that another 14 people were injured when gunmen attacked the gathering of young people at a house party Friday , the state-run Notimex news agency reported .

The victims killed were between ages 14 and 30 , Notimex said . Children as young as 7 and 11 were among the injured , the agency reported .

Salas said authorities were investigating the backgrounds of all the victims .

Mexico 's National Human Rights Commission said it was sending representatives to the neighborhood , which was near another home where cartel gunmen stormed a house party in January , killing 15 people . Most of the victims in that shooting were youths who had no ties to organized crime .

Investigators said the January shooting was a case of mistaken identity caused by bad intelligence . It sparked widespread outrage in the violent border city , including calls for Mexican President Felipe Calderon to resign .

In a news conference Saturday , the country 's deputy interior minister told reporters federal authorities will maintain the security strategy they are developing with state officials .

`` We are here to address this deplorable and condemnable acts , and to ensure full support to local authorities investigating these unfortunate events , '' deputy interior minister Juan Marcos Gutierrez said , according to Notimex .

CNN 's Nick Valencia contributed to this report .

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A prosecutor says 14 people were killed and 14 others were injured

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Authorities are investigating the backgrounds of the victims

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Mexico 's National Human Rights Commission is sending a team to the neighborhood